Plasma and Fusion Research

Volume 13, 1202077 (2018)

Rapid Communications

Poloidal Flow Velocity Measurement in High-Density NBI Plasmas of Heliotron J
Xiangxun LU, Shinji KOBAYASHI1), Shun TANOHIRA, Katsumi IDA2), Shin NISHIMURA2), Yoshiro NARUSHIMA2), Kazunobu NAGASAKI1), Shinichiro KADO1), Hiroyuki OKADA1), Takashi MINAMI1), Shinsuke OHSHIMA1), Satoshi YAMAMOTO1), Yuma YONEMURA, Naoyuki HAJI, Shintaro WATANABE, Hisashi OKAZAKI, Tomomi KANAZAWA, Panith ADULSIRISWAD, Akihiro ISHIZAWA, Yuji NAKAMURA, Shigeru KONOSHIMA1) and Tohru MIZUUCHI1)
Graduate School of Energy Science, Kyoto University, Uji 611-0011, Japan
1)
Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan
2)
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
(Received 5 February 2018 / Accepted 19 March 2018 / Published 25 June 2018)

Abstract

A high-density experiment using a novel fueling technique—high-intensity gas puffing (HIGP)—has been performed in Heliotron J. Using the recently developed charge exchange recombination spectroscopy (CXRS), a poloidal flow shear is observed at the peripheral region of high-density NBI plasmas. The evaluation of radial electric field based on the experimental results of toroidal and poloidal rotation velocities shows the formation of a large Er shear in the peripheral region.

Keywords

CXRS system, Poloidal rotation, Er shear, High-density NBI plasma, Heliotron J

DOI: 10.1585/pfr.13.1202077

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References

  • [1] A. Fujisawa et al., Phys. Rev. Lett. 82, 2669 (1999).
  • [2] K. Crombé et al., Phys. Rev. Lett. 95, 155003 (2005).
  • [3] T. Mizuuchi et al., Proc. 25th IAEA Fusion Energy Conf. Saint Pete, EX/P4 (2014).
  • [4] arXiv:1803.08339 [physics.plasm-ph].
  • [5] H. Lee et al., Plasma Fusion Res. 7, 1402019 (2012).
  • [6] H. Wobig and J. Kibiinger, Plasma Phys. Control. Fusion 37, 893 (1995).
  • [7] K. Ida, Plasma Phys. Control. Fusion 40, 1429 (1998).
  • [8] L. Zang et al., Phys. Plasmas 21, 3 (2014).